Only used 19 oz of UV clear on 2 doors

alex1970

alex1970

Promoted Users
First time spraying clear on anything large. I was afraid of runs and think I moved my LPH300 too fast and put down too light of a coat. Only used 4 oz first coat for both doors. 30 min later put down another and moved a little slower still only used about 4 oz. Repeat for coats 3, 4, 5. So I was expecting 6 or 7 oz per coat per door and actually only used about 2 per door??
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Honestly, it looks to me like you need to 400 grit sand and reclear. Turn your paint up some and slow down. Dealing with a run or two would be a lot easier to correct than super dry which is what I'm seeing.
 
Those are pretty light coats. If you can't get yourself to slow down, at least increase your overlap, decreasing the vertical spacing between passes to just a couple of inches might help you.
 
Oh, after re-reading the OP, I see an LPH-300 was used. I have never even seen one of those in person.
 
Ok thought it was a good gun and pretty much understood it did not spray the volume as a full size gun but I guess I am still figuring it out. Final question: I want to sand down with 800 and not break thru, then shoot more clear. Can I leave the low spots (dots) or do I need to sand completely flat. thanks:cool:
 
alex1970 said:
Ok thought it was a good gun and pretty much understood it did not spray the volume as a full size gun but I guess I am still figuring it out. Final question: I want to sand down with 800 and not break thru, then shoot more clear. Can I leave the low spots (dots) or do I need to sand completely flat. thanks:cool:
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If you flatten the majority of the texture then go over it with a gray scotchbrite and preferably using a sanding paste like scuff stuff then you will be OK. If you don't have sanding paste it's ok to use just the grey scotchbrite, it just takes longer to do. DO it wet with a detegent like Dawn. You want to scuff it to help scuff inside any remaining texture spots.
 
Whitesnake said:
Lph 300 is not a “mini gun” …I have one with a 1.8 I use for primer. Lph 80 is a mini gun.
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It's not full size. It has like an 8 inch fan pattern. Compare it to a LPH400 which has a 12-13 inch fan pattern. A small fan makes it hard to spray anything the size of a door.
 
@alex1970
When you respray make sure you overlap 75%. You will have to pay close attention to your overlap and the straightness of your passes due to the smaller fan of that gun. Slow down, overlap 75% and it should come out OK.
 
My rookie contribution is if that's all you have painted then I would just start over and block it with 400. Seal it and base it and clear it. I think u will burn thru and have to do that anyway
 
Chris_Hamilton said:
@alex1970
When you respray make sure you overlap 75%. You will have to pay close attention to your overlap and the straightness of your passes due to the smaller fan of that gun. Slow down, overlap 75% and it should come out OK.
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That makes sense, I know my overlaps were no where near 75%. My plan was to use my Devilbiss for Epoxy, 2K & Base and the LPH300 for clear. I had one bad waterfall with my base and with that in my mind I think I was too scared to put the clear on too heavy. Not sure what's worse runs or dry spray & peel. I plan to reclear today.
 
alex1970 said:
That makes sense, I know my overlaps were no where near 75%. My plan was to use my Devilbiss for Epoxy, 2K & Base and the LPH300 for clear. I had one bad waterfall with my base and with that in my mind I think I was too scared to put the clear on too heavy. Not sure what's worse runs or dry spray & peel. I plan to reclear today.
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The key to runs, is a lot of time to dry. Let it sit overnight and they will shrink a lot. I've always rushed them and have paid the price. Dry spray is more dangerous because you have less material to work with.
 
When you realized that you were only applying 1/2 of the amount of paint per coat the red flag went up in your mind. That is when you should have looked for the problem. Is my gun adjusted properly? Am I moving too fast? Am I holding the gun too far from the panel?

There needs to be enough clear on the panel to allow it to flow. This will minimize the amount of orange peel and eliminate the dry spray.

Your spraying speed should be around 12" per second with that gun. So practice moving your hand across the panel and say 1/1000 while moving 12". That will give you an approximate 1 second time. You will probably be tempted to think that's too slow but give it a try and see what happens. You can always make adjustments but I think overall it will get you in the ballpark.
 
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